Crossword Genius

Does one pan for brass? (6)

Ross

I believe the answer is:

critic

I'm a little stuck... Click here to teach me more about this clue!

This might be a double definition.

'does one' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'pan for brass?' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

Can you help me to learn more?

(Other definitions for critic that I've seen before include "Commentator, pundit" , "Writer of reviews" , "Newspaper reviewer" , "Reviewer of book or play" , "One writing reviews" .)

I've seen this clue in The Independent.
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